Trump directs Pentagon to reduce military drills with South Korea

President Trump has instructed the Pentagon to scale back joint military exercises with South Korea, a move that carries significant implications for the security architecture of the Korean Peninsula and the broader Indo-Pacific region.

Trump’s approach to US-South Korea military exercises has been remarkably consistent across both terms. In August 2018, shortly after his historic Singapore summit with North Korean leader Kim Jong Un, he suspended major joint drills. The rationale then was twofold: the exercises cost too much, and they were “provocative,” a word North Korea had been using for decades to describe them.

By March 2019, following the failed Hanoi summit with Kim, the Pentagon formally ended the spring exercises known as Key Resolve and Foal Eagle. The decision came amid tense cost-sharing negotiations with Seoul over who should pay what for the US military presence on the peninsula.

Several marquee exercises have been reduced or outright canceled since 2018, including Freedom Guardian and Ulchi. In many cases, the scaling back came at North Korea’s explicit request, which critics have argued amounts to granting Pyongyang unilateral concessions without receiving anything concrete in return.

The US currently maintains approximately 28,500 troops in South Korea, a presence that dates back to the Korean War armistice in 1953. In late 2025, Congress passed legislative measures designed to prevent further reductions to the force.

The 2026 defense strategy shift

The Pentagon’s January 2026 National Defense Strategy explicitly outlines a “more limited” US role on the Korean Peninsula, stating that South Korea will take primary responsibility for deterring North Korea with reduced American support.

South Korea fields approximately 450,000 active military personnel. The reduction in exercises matters because joint drills build interoperability, the ability of two militaries to fight together seamlessly in a crisis.

Regional ripple effects

Japan, which hosts roughly 54,000 US military personnel and relies on American extended deterrence guarantees, will be watching closely. Congressional opposition could complicate implementation, as the late 2025 legislation aimed at preserving troop levels signals a bipartisan constituency for maintaining a robust US posture in Korea. Reducing exercises while keeping troop numbers static creates an awkward middle ground: the forces are there, but they are practicing less.

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